ArticleThe New phytologist2022
A phosphorus-limitation induced, functionally conserved DUF506 protein is a repressor of root hair elongation in plants.
Article in The New phytologist, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 25 citations in OpenAlex.
- Identification and Analysis of DUF506 Gene Family in Peanut (Biomolecules · 2026Article
- Nitrogen-phosphorus stoichiometry shapes seedling growth and yield performance of perennial cool-season forage grasses in saline-alkali soil.BMC plant biology · 2025Article
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- Review
- Overexpression of OsDUF6 increases salt stress tolerance in rice.BMC plant biology · 2024Article
- A stress-inducible protein regulates drought tolerance and flowering time in Brachypodium and Arabidopsis.Plant physiology · 2023Article
- Genome-wide identification ofPeerJ · 2023Article
- A novel calmodulin-interacting Domain of Unknown Function 506 protein represses root hair elongation in Arabidopsis.Plant, cell & environment · 2022Article
- GWAS and transcriptome analysis reveal MADS26 involved in seed germination ability in maize.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2022Article
- Genome-Wide Identification and Transcriptional Analysis of ArabidopsisInternational journal of molecular sciences · 2021Article
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4 authors at 1 institution in 1 country.
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Abstract
Root hairs (RHs) function in nutrient and water acquisition, root metabolite exudation, soil anchorage and plant-microbe interactions. Longer or more abundant RHs are potential breeding traits for developing crops that are more resource-use efficient and can improve soil health. While many genes are known to promote RH elongation, relatively little is known about genes and mechanisms that constrain RH growth. Here we demonstrate that a DOMAIN OF UNKNOWN FUNCTION 506 (DUF506) protein, AT3G25240, negatively regulates Arabidopsis thaliana RH growth. The AT3G25240 gene is strongly and specifically induced during phosphorus (P)-limitation. Mutants of this gene, which we call REPRESSOR OF EXCESSIVE ROOT HAIR ELONGATION 1 (RXR1), have much longer RHs, higher phosphate content and seedling biomass, while overexpression of the gene exhibits opposite phenotypes. Co-immunoprecipitation, pull-down and bimolecular fluorescence complementation (BiFC) analyses reveal that RXR1 physically interacts with a RabD2c GTPase in nucleus, and a rabd2c mutant phenocopies the rxr1 mutant. Furthermore, N-terminal variable region of RXR1 is crucial for inhibiting RH growth. Overexpression of a Brachypodium distachyon RXR1 homolog results in repression of RH elongation in Brachypodium. Taken together, our results reveal a novel DUF506-GTPase module with a prominent role in repression of plant RH elongation especially under P stress.
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